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fs: quota: Replace GFP_ATOMIC with GFP_KERNEL in dquot_init 

dquot_init() is never called in atomic context.
This function is only set as a parameter of fs_initcall().

Despite never getting called from atomic context,
dquot_init() calls __get_free_pages() with GFP_ATOMIC,
which waits busily for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
to avoid busy waiting and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jia-Ju Bai 2018-04-09 22:31:19 +08:00 committed by Jan Kara
parent 54a307ba8d
commit 1aa3b3e0cb
1 changed files with 1 additions and 1 deletions
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2
fs/quota/dquot.c
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@ -2966,7 +2966,7 @@ static int __init dquot_init(void)
NULL);
order = 0;
dquot_hash = (struct hlist_head *)__get_free_pages(GFP_ATOMIC, order);
dquot_hash = (struct hlist_head *)__get_free_pages(GFP_KERNEL, order);
if (!dquot_hash)
panic("Cannot create dquot hash table");